NameError: .box-shadow is undefined in /Users/haifeng/IT/01_Study/github_projects/js_framework/public/js/lib/bootstrap/3.0.0/css/progress-bars.less on line 45, column 3:
44   border-radius: @border-radius-base;
45   .box-shadow(inset 0 1px 2px rgba(0,0,0,.1));
46 }

